Textile processing machines

ABSTRACT

Suction apparatus for textile yarn processing machines for reducing the drag on running yarns passing through a tube in which a collet is mounted in the bore of the tube at each end and at points of change of direction of the tube to centralize the air stream therethrough and maintain the yarn out of contact with the bore.

United States Patent Howorth et al.

TEXTILE PROCESSING MACHINES Inventors: Frederick Hugh Howorth, Chorley;

Donald Stockley Pilton, Bolton, both of England Assignee: James Howorth & Company Limited, Bolton, England Filed: on. 21, 1971 Appl. 190.; 191,401

Foreign Application Priority Data Oct. 29, 1970 Great Britain 51,594/70 Nov. 13, 1970 Great Britain 54,046/70 Nov. 26, 1970 Great Britain 56,542/70 US. Cl ..226/97, 138/37 Int. Cl B65h 17/32 Field of Search 226/7, 97; 239/590 1451 Sept. 4, 1973 [56] References Cited UNITED STATES PATENTS 3,303,982 2/1967 Balch 226/97 3,232,557 2/1966 Winn, Jr. 226/97 X 3,096,946 7/1963 Schweiter 239/590 X 2,327,449 8/1943 Parker 138/37 Primary Examiner-Allen N. Knowles Attorney-Norris & Bateman [57] ABSTRACT Suction apparatus for textile yarn processing machines for reducing the drag on running yarns passing through a tube in which a collet is mounted in the bore of the tube at e ac h end and at points of change of direction of the tube to centralize the air stream therethrough and maintain the yarn out of contact with the bore.

4 Claims, 7 Drawing Figures PATENIEBsEP 4 ma "him" 1 TEXTILE PROCESSING MACHINES This invention relates to improvements in textile processing machines and more particularly to suction apparatus for retaining the ends of running yarn.

It has been proposed to convey continuous lengths of yarn to or from processing machines through suction tubes in which the yarn is drawn along the tube by a current of air out of contact with the walls but difficulty has been experienced when it is required to change the direction of travel of the yarn. When passing through a bend in the tube the yarn comes in contact with the wall of the tube which causes an increase in the drag on the yarn, and breakages and an increase in the power required by a fan to propel the yarn through the tube.

The object of the invention is to reduce the drag on the yarn and also the power required for traversing the yarn through the tube and evening up the suction in the tubes.

The invention comprises tubes for the passage of running yarns in which collets are mounted in each tube at any change in direction of the yarn passing therethrough.

The invention will be described with reference to the accompanying drawings:

FIG. 1 is a sectional plan through a tube and collet showing the passage of yarn therethrough;

FIG. 2 is a plan of a plurality of yarn tubes coupled to a header connected by a return tube to a suction pump or fan;

FIG. 3 is a sectional plan of part of a tube connected to a header;

FIG. 4 is a sectional plan showing running yarn passing from one tube to a tube parallel therewith;

FIG. 5 is a plan of two substantially parallel tubes for the collection of broken ends or during threading up;

FIG. 6 is a sectional plan enlarged and showing a further form of collet;

FIG. 7 is a section on line 7 7 of FIG. 6.

A collet A is mounted at the ennd of or intermediate the ends of a tube B for the passage of a running yarn in yarn processing machines to prevent the yarn from contacting the bore of the tube at any change of direction of the passage of the yarn therethrough. As shown in FIG. 1 yarn passing from a heater tube B of a coupling machine is directed through the bore b of the collet A. The end of the tube B is flared outwards and the direction of air passing therethrough tends to draw the collet into the tube thereby providing a seal between the bore of the tube and the collet. A tubular connection C formed with a right angle bend at one end is mounted in the outer end of the collet and to a further collet (not shown) to direct the yarn into a succeeding tube.

In the arrangement shown in FIGS. 2, 3 and 5 for collecting broken yarns ends and yarn prior to threading up and at doffing on textile processing machines or in running yarn from a creel, one end of a tube B is connected to a suction fan D arranged to draw air and running yarn through header tubes B from tubes B connected to the creel or tubes for broken ends or the like. A collet A is fitted into the the junctures between tubes B and B to guide the yarn into and from the header. It has been found that by connecting the Ian D to the tube B the suction in the tubes B is substantially even through the length of the tubes, for collecting broken ends.

FIG. 4 shows an alternative arrangement for connecting the ends of two tubes B.

In a further arrangement with a U tube B the collet is in the form of a baffle A provided in the bend with inclined legs a at an inclination to the direction of flow of the air stream to direct the stream away from the runner wall of the bend.

Where broken yarn ends or prior to threading up pass from holes or apertures ito the suction tube bunching or entaglement of the yarn in the tube may occur where the holes or apertures are arranged in line along the length of the tube and it has been found that bunching or entanglement is reduced by staggering the holes or apertures so that one hole or aperture is provided at 45 to adjacent holes or apertures.

A collet A is arranged in each hole or aperture to direct the yarn into the tube.

The centralisation of the air stream causes the yarn ends or running yarn to pass centrally along the tubes to a collecting chamber with filters adjacent the entry of the fan.

What I'claim is:

l. Suction apparatus for textile yarn processing machines comprising a tube of generally U-shape through the bore of which running yarn is adapted to be drawn, a fan connected to one end of said tube for producing air flow through said tube, a collet in the form of a baf- He provided in the bend of said tube and having inclined legsmounted at the regions of changes of direction of said bore for directing air substantially centrally of said bore for maintaining said yarn against contact with the wall of said tube at said bend.

2. Suction apparatus for textile yarn processing machines comprising tube means having a bore through which running yarn is to be drawn, said tube means having at least one fixed change of direction portion intermediate its ends, means operatively connected to said tube means providing a source of reduced pressure to establish an air stream therethrough, and a collet within said bore at said change of direction portion providing a reduced diameter central opening therethrough for maintaining the air stream substantially centrally of said tube means whereby the running yarn is maintained out of contact with the bore of said tube means while passing through said change of direction portion.

3. The suction apparatus defined in claim 2, wherein said tube means comprises at least one tube joined at its yarn discharge end to a header tube at an angle that provides said change of direction portion in said tube means, and said collet is mounted within said yarn discharge end of said one tube.

4. The suction apparatus defined in claim 2, wherein said tube means comprise two side by side tubes connected into a member defining a passage between two adjacent ends of said tubes, and collets are mounted within the ends of each of said tubes at the junctures with said member. 

1. Suction apparatus for textile yarn processing machines comprising a tube of generally U-shape through the bore of which running yarn is adapted to be drawn, a fan connected to one end of said tube for producing air flow through said tube, a collet in the form of a baffle provided in the bend of said tube and having inclined legs mounted at the regions of changes of direction of said bore for directing air substantially centrally of said bore for maintaining said yarn against contact with the wall of said tube at said bend.
 2. Suction apparatus for textile yarn processing machines comprising tube means having a bore through which running yarn is to be drawn, said tube means having at least one fixed change of direction portion intermediate its ends, means operatively connected to said tube means providing a source of reduced pressure to establish an air stream therethrough, and a collet within said bore at said change of direction portion providing a reduced diameter central opening therethrough for maintaining the air stream substantially centrally of said tube means whereby the running yarn is maintained out of contact with the bore of said tube means while passing through said change of direction portion.
 3. The suction apparatus defined in claim 2, wherein said tube means comprises at least one tube joined at its yarn discharge end to a header tube at an angle that provides said change of direction portion in said tube means, and said collet is mounted within said yarn discharge end of said one tube.
 4. The suction apparatus defined in claim 2, wherein said tube means comprise two side by side tubes connected into a member defining a passage between two adjacent ends of said tubes, and collets are mounted within the ends of each of said tubes at the junctures with said member. 